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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/*** shape-table.c --- Shape table ADT.

 *

 ** Author: Steve Folkes <smf@hermes.mod.uk>

 *

 *** Commentary:

 *

 * This file implements the shape table routines used by the TDF linker.

 *

 *** Change Log:

 * $Log: shape-table.c,v $

 * Revision 1.1.1.1  1998/01/17  15:57:20  release

 * First version to be checked into rolling release.

 *

 * Revision 1.3  1995/09/22  08:39:34  smf

 * Fixed problems with incomplete structures (to shut "tcc" up).

 * Fixed some problems in "name-key.c" (no real problems, but rewritten to

 * reduce the warnings that were output by "tcc" and "gcc").

 * Fixed bug CR95_354.tld-common-id-problem (library capsules could be loaded

 * more than once).

 *

 * Revision 1.2  1994/12/12  11:46:50  smf

 * Performing changes for 'CR94_178.sid+tld-update' - bringing in line with

 * OSSG C Coding Standards.

 *

 * Revision 1.1.1.1  1994/07/25  16:03:38  smf

 * Initial import of TDF linker 3.5 non shared files.

 *

**/

/****************************************************************************/

#include "shape-table.h"

#include "solve-cycles.h"

/*--------------------------------------------------------------------------*/

ShapeTableP

shape_table_create PROTO_Z ()

{

    ShapeTableP table = ALLOCATE (ShapeTableT);

    unsigned    i;

    for (i = 0; i < SHAPE_TABLE_SIZE; i ++) {

	table->contents [i] = NIL (ShapeEntryP);

    }

    table->token_entry = NIL (ShapeEntryP);

    table->tag_entry   = NIL (ShapeEntryP);

    return (table);

}

ShapeEntryP

shape_table_add PROTO_N ((table, key))

		PROTO_T (ShapeTableP table X

			 NStringP    key)

{

    unsigned     hash_value = (nstring_hash_value (key) % SHAPE_TABLE_SIZE);

    ShapeEntryP *entryp     = &(table->contents [hash_value]);

    ShapeEntryP  entry;

    while ((entry = *entryp) != NIL (ShapeEntryP)) {

	if (nstring_equal (key, shape_entry_key (entry))) {

	    return (entry);

	}

	entryp = shape_entry_next_ref (entry);

    }

    entry   = shape_entry_create (key);

    *entryp = entry;

    return (entry);

}

ShapeEntryP

shape_table_get PROTO_N ((table, key))

		PROTO_T (ShapeTableP table X

			 NStringP    key)

{

    unsigned    hash_value = (nstring_hash_value (key) % SHAPE_TABLE_SIZE);

    ShapeEntryP entry      = (table->contents [hash_value]);

    while (entry) {

	if (nstring_equal (key, shape_entry_key (entry))) {

	    return (entry);

	}

	entry = shape_entry_next (entry);

    }

    return (NIL (ShapeEntryP));

}

ShapeEntryP

shape_table_get_token_entry PROTO_N ((table))

			    PROTO_T (ShapeTableP table)

{

    if (table->token_entry == NIL (ShapeEntryP)) {

	NStringT nstring;

	nstring_copy_cstring (&nstring, "token");

	table->token_entry = shape_table_get (table, &nstring);

	nstring_destroy (&nstring);

    }

    return (table->token_entry);

}

ShapeEntryP

shape_table_get_tag_entry PROTO_N ((table))

			  PROTO_T (ShapeTableP table)

{

    if (table->tag_entry == NIL (ShapeEntryP)) {

	NStringT nstring;

	nstring_copy_cstring (&nstring, "tag");

	table->tag_entry = shape_table_get (table, &nstring);

	nstring_destroy (&nstring);

    }

    return (table->tag_entry);

}

void

shape_table_iter PROTO_N ((table, proc, closure))

		 PROTO_T (ShapeTableP table X

			  void      (*proc) PROTO_S ((ShapeEntryP, GenericP)) X

			  GenericP    closure)

{

    unsigned i;

    for (i = 0; i < SHAPE_TABLE_SIZE; i ++) {

	ShapeEntryP entry = (table->contents [i]);

	while (entry) {

	    (*proc) (entry, closure);

	    entry = shape_entry_next (entry);

	}

    }

}

void

shape_table_deallocate PROTO_N ((table))

		       PROTO_T (ShapeTableP table)

{

    unsigned i;

    for (i = 0; i < SHAPE_TABLE_SIZE; i ++) {

	ShapeEntryP entry = (table->contents [i]);

	while (entry) {

	    entry = shape_entry_deallocate (entry);

	}

    }

}

/*

 * Local variables(smf):

 * eval: (include::add-path-entry "../os-interface" "../library")

 * eval: (include::add-path-entry "../generated")

 * end:

**/